The speed wobble seems to be an ongoing issue for you........I would be exploring why that is, perhaps it is the wheel/tire combination that is upsetting the bike, it does look high at the front of the bike, although I would have thought that would make the steering more stable........... I have learnt that the best way to improve a Featherbed type framed bike, from some of their bad handling characteristics is to lower the front of the frame, that is jack the rear higher and lower the front. This makes the steering much sharper, and stops much of the common "Patter" that occurs on hard cornering on these bikes to the front wheel. One of our boys here that I have raced against runs a pre war 500 BSA....... I know when I have followed him at a descent pace into a certain left hander at one of our tracks, I have seen his bike start to wobble quite badly, enough to slow him and I was able to quickly overtake him on the inside. I do remember on this same BSA that he too is running a large diameter front wheel/tire, perhaps a 21" I cant help but feel this is part of the problem........ Do you have other members of your race club that can give some useful advice, ones that have had similar issues on similar bikes............ Good luck........ Cheers......... Greg.